Turnover Temperatures for Doubly Rotated Quartz,

Abstract

The turnover temperatures, Tto, of quartz plates vibrating in the thickness mode are calculated for doubly rotated orientations in the temperature range of -200 to +200 degrees C. In addition to the standard cuts of interest situated along the loci of zero values of the first order temperature coefficients of frequency, we find another family of doubly rotated quartz orientations, vibrating in c-mode resonance, with Tto values 70 degrees C and above. The significance of these orientations are that for the same Tto they are considerably less sensitive to crystallography orientation than currently utilized singly or doubly rotated cuts. For Tto = 90 degrees C, the static frequency as a function of temperature coefficients of these orientations are between the AT-cut and BT-cuts, and they become less sensitive to temperature with increasing Tto.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1982
Accession Number
ADP001516

Entities

People

  • Alfred Kahan

Tags

DTIC Thesaurus Topics

  • Coefficients
  • Crystallography
  • Frequency
  • Orientation (Direction)
  • Resonance
  • Resonant Frequency
  • Standards
  • Temperature Coefficients
  • Thickness

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.